Asymmetric Acoustic Horn

Abstract

In one embodiment, an asymmetric acoustic horn is provided. The asymmetric acoustic horn includes a single acoustic waveguide. The single acoustic waveguide includes a first asymmetric horn section configured to support one or more first acoustic transducers and a second asymmetric horn section configured to support one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers. The first and second asymmetric horn sections are adjacent to each other and configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by one or more corresponding predetermined fixed distances.

Description

[Technical field]

[0001] [Related Applications] This application claims the benefit of the following priority applications: U.S. Provisional Application No. 63 / 037,277, filed June 10, 2020, and European Application No. 20179169.6, filed June 10, 2020.

[0002] [Related fields] This application relates generally to acoustic horns. [Background technology]

[0003] It is often desirable to shape the acoustic radiation pattern of a loudspeaker to direct acoustic energy toward a desired target or audience area using a shaped horn. These horns typically have an inlet where a single transducer can acoustically excite the air entering the horn, followed by a throat region with a nominal acoustic impedance, and an exit region where the radiating wavefront exits the horn. In some comparative examples, these horns are designed with a rectangular acoustic radiation pattern, such as a 90° horizontal and 40° vertical pattern. Summary of the Invention

[0004] In one aspect of the disclosure, an asymmetric acoustic horn is provided. The asymmetric acoustic horn includes a single acoustic waveguide. The single acoustic waveguide includes a first asymmetric horn section configured to support one or more first acoustic transducers and a second asymmetric horn section configured to support one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers. The first asymmetric horn section and the second asymmetric horn section are adjacent to one another and configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

[0005] In another aspect of the disclosure, a speaker is provided. The speaker includes one or more first acoustic transducers, one or more second acoustic transducers, and an asymmetric acoustic horn. The asymmetric acoustic horn includes a single acoustic waveguide. The single acoustic waveguide includes a first asymmetric horn section configured to support the one or more first acoustic transducers and a second asymmetric horn section configured to support one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers. The first asymmetric horn section and the second asymmetric horn section are adjacent to one another and are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

[0006] In yet another aspect of the disclosure, a method is provided. The method includes outputting a first acoustic energy to a first asymmetric horn section of an asymmetric acoustic horn having a single acoustic waveguide using one or more first acoustic transducers. The method includes outputting a second acoustic energy to a second asymmetric horn section of the asymmetric acoustic horn in parallel with outputting the first acoustic energy to the first asymmetric horn section of the asymmetric acoustic horn using one or more second acoustic transducers. The method also includes outputting a first asymmetric radiation pattern from the first asymmetric horn section and a second asymmetric radiation pattern from the second asymmetric horn section using the asymmetric acoustic horn. The first and second asymmetric horn sections are adjacent to one another and are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

[0007] One or more of the above aspects of the present disclosure provide a more even sound radiation distribution across an audience plane, particularly in stadium seating acoustic environments. Thus, various aspects of the present disclosure provide an improvement in at least the art of sound radiation pattern control. [Brief description of the drawings]

[0008] The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Patent and Trademark Office upon request and payment of the necessary fee.

[0009] These and other more detailed and specific features of the various embodiments are more fully disclosed in the following description, which refers to the accompanying drawings.

[0010] [Figure 1] FIG. 2 illustrates a side view of an example asymmetric dual entrant acoustic horn according to various aspects of the present disclosure.

[0011] [Diagram 2] FIG. 1 illustrates a perspective view of an example of an asymmetric dual entrant acoustic horn, according to various aspects of the present disclosure.

[0012] [Diagram 3] 3A and 3B show front views of example acoustic radiation patterns output by the asymmetric dual-entrant acoustic horn of FIGS. 1 and 2 in accordance with various embodiments of the present disclosure.

[0013] [Figure 4] FIG. 3 illustrates a perspective view of an acoustic radiation pattern output by the asymmetric dual-entrant acoustic horn of FIGS. 1 and 2 in accordance with various embodiments of the present disclosure.

[0014] [Diagram 5] 3A and 3B show examples of acoustic radiation patterns output by the asymmetric dual entrant acoustic horn of FIGS. 1 and 2 for stadium seating in accordance with various aspects of the present disclosure.

[0015] [Figure 6] 3 is a heat map illustrating an example of a 1 kHz acoustic energy distribution output by the asymmetric dual entrant acoustic horn of FIGS. 1 and 2 relative to an audience plane, according to various embodiments of the present disclosure.

[0016] [Figure 7] 3 is a heat map illustrating an example of a 10 kHz acoustic energy distribution output by the asymmetric dual entrant acoustic horn of FIGS. 1 and 2 relative to an audience plane, according to various embodiments of the present disclosure.

[0017] [Figure 8] FIG. 2 illustrates a front view of an example of a comparative acoustic radiation pattern output by an exemplary comparative symmetric acoustic horn.

[0018] [Figure 9] 1A-1C are perspective views of example comparative acoustic radiation patterns output by an exemplary comparative symmetric acoustic horn;

[0019] [Figure 10] FIG. 1 shows an example of an acoustic radiation pattern output by a comparative symmetric acoustic horn relative to stadium seating.

[0020] [Figure 11] 1 is a heat map showing an example of 1 kHz acoustic energy distribution output by a comparative symmetric acoustic horn relative to the audience plane.

[0021] [Figure 12] 1 is a heat map showing an example of 10 kHz acoustic energy distribution output by a comparative symmetric acoustic horn relative to the audience plane.

[0022] [Figure 13] 3 is a table illustrating the differences between the asymmetric dual entrant acoustic horn of FIGS. 1 and 2 and conventional acoustic horns, according to various embodiments of the present disclosure.

[0023] [Figure 14] 1 is a flowchart illustrating an exemplary method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The present disclosure and aspects thereof may be embodied in a variety of forms, including hardware or other structures controlled by computer-implemented methods, computer program products, computer systems and networks, user interfaces, and application programming interfaces, as well as hardware-implemented methods, signal processing circuits, memory arrays, application specific integrated circuits (ASICs), field programmable gate arrays, etc. The foregoing summary is intended merely to provide a general idea of ​​various aspects of the disclosure and is not intended to limit the scope of the disclosure in any way.

[0025] In the following description, numerous details are set forth, such as shapes, dimensions, operations, etc., in order to provide an understanding of one or more aspects of the present disclosure. Those skilled in the art will readily appreciate that these specific details are merely examples and are not intended to limit the scope of the present application.

[0026] Horns designed with a rectangular acoustic radiation pattern, such as a 90° horizontal and 40° vertical pattern, are typically set relative to the entrance of a single transducer and provide the described rectangular coverage pattern over a portion of the transducer's usable frequency range. However, with a rectangular coverage pattern, it is difficult to achieve wideband coverage control without using multiple individual horns.

[0027] Additionally, one may wish to use non-rectangular pattern control to better focus acoustic energy to a target viewer area, where that viewer area may be at a significantly different distance and relative angle from the radiating horn source. For example, in a typical cinema exhibition space using angled stadium seating, the first row of viewers may be very close to the screen's loudspeakers and positioned at an angle below the loudspeakers, while the back row of the viewer space may be much further away and positioned at an angle above the screen's loudspeakers. Within such a cinema space, the use of a conventional rectangular radiating horn, such as the aforementioned 90° x 40° horn, would result in an uneven acoustic energy distribution throughout the viewer area. It should also be noted that this type of poor coverage control cannot be easily solved with equalization, as the resulting equalized solution may only apply to certain areas within the viewer space.

[0028] In view of the problems associated with the aforementioned rectangular horn, the present disclosure aims to provide a single acoustic horn supporting two or more transducer inlets and asymmetric radiation pattern control over a portion of the usable frequency range of both transducers to provide more uniform acoustic coverage to target audience areas that may be located at various distances and angles relative to the horn. A radiation pattern is considered to be "asymmetric" if it has a shape that is not symmetric with respect to a horizontally extending plane.

[0029] This acoustic horn of the present disclosure is referred to as an "asymmetric dual entrant acoustic horn." In particular, the asymmetric dual entrant acoustic horn is operable to provide asymmetric acoustic radiation pattern control using two or more transducer inlets that acoustically sum in regions of excitation overlap. The asymmetric dual entrant acoustic horn includes an asymmetrically shaped mechanical structure that supports two or more transducer excitation inlets and a unified pneumatic outlet.

[0030] 1 is a diagram illustrating a side view of an example of an asymmetric dual entrant acoustic horn 100 according to various embodiments of the present disclosure. In the example of FIG. 1, the asymmetric dual entrant acoustic horn 100 can have a continuous structure including a high frequency asymmetric horn section 102 integrated with a mid frequency asymmetric horn section 106 to form the asymmetric dual entrant horn 100.

[0031] The high frequency asymmetric horn section 102 is configured to removably attach to and support one or more high frequency transducers 104. The one or more high frequency transducers 104 are configured to generate acoustic energy at frequencies between 10 kilohertz (kHz) and 20 kHz.

[0032] Similarly, the mid-frequency asymmetric horn section 106 is configured to removably attach to and support one or more mid-frequency transducers 108. The one or more mid-frequency transducers 108 are configured to generate acoustic energy at frequencies between 1 kilohertz (kHz) and 10 kHz.

[0033]

[0023] Figure 2 illustrates a perspective view of the asymmetric dual entrant acoustic horn 100 of Figure 1 in accordance with various embodiments of the present disclosure. In the example of Figure 2, the high frequency asymmetric horn section 102 includes a high frequency diffraction slot 110 and the mid frequency asymmetric horn section 106 includes a mid frequency diffraction slot 112.

[0034] 2, the high frequency asymmetric horn section 102 is integrated with the mid frequency asymmetric horn section 106 at the location where the comparative symmetric mid frequency horn receives acoustic energy output at the highest frequency. Specifically, the high frequency diffraction slot 110 is located above the mid frequency diffraction slot 112 in the Y direction. Additionally, the high frequency asymmetric horn section 102 and the mid frequency asymmetric horn section 106 combine to form a unified air pressure outlet.

[0035] The high frequency asymmetric horn section 102 and the mid frequency asymmetric horn section 106 use one or more diffraction slots and constant directivity design techniques to control the acoustic radiation output by the asymmetric dual entrant acoustic horn 100. As shown in FIG. 2, the high frequency asymmetric horn section 102 of the asymmetric dual entrant acoustic horn 100 is located inside the top of the mid frequency asymmetric horn section 106, just outside the mid frequency diffraction slots 112.

[0036] In some examples, assuming a cross-section of the asymmetric dual entrant acoustic horn 100 along a plane intersecting both the mid-frequency diffraction slot 112 and the high-frequency diffraction slot 110, the mid-frequency asymmetric horn section 106 may have a maximum length in the Z direction from the end of the throat section associated with the mid-frequency asymmetric horn section 106 (i.e., the origin) to the end of the unified air pressure outlet associated with the mid-frequency asymmetric horn section 106 of about 500 millimeters (mm). By comparison, in these examples, the high-frequency asymmetric horn section 102 may have a maximum length in the Z direction from the origin to the end of the unified air pressure outlet associated with the high-frequency asymmetric horn section 102 of about 433 mm, and a maximum length in the Z direction from the end of the throat section associated with the high-frequency asymmetric horn section 102 to the end of the unified air pressure outlet associated with the high-frequency asymmetric horn section 102 of about 253 mm.

[0037] In some examples, assuming a cross-section of the asymmetric dual entrant acoustic horn 100 along a plane intersecting both the mid-frequency diffraction slot 112 and the high-frequency diffraction slot 110, the mid-frequency asymmetric horn section 106 may have a length in the Y-direction of about 381 millimeters (mm) from a centerline (i.e., the origin) through the throat section associated with the mid-frequency asymmetric horn section 106 to an end of the unified air pressure outlet associated with the mid-frequency asymmetric horn section 106. By comparison, in these examples, the high-frequency asymmetric horn section 102 may have a length in the Y-direction of about 378 mm from the origin to an end of the unified air pressure outlet associated with the high-frequency asymmetric horn section 102.

[0038] In some examples, assuming a cross-section of the asymmetric dual entrant acoustic horn 100 along a plane intersecting both the mid-frequency diffraction slot 112 and the high-frequency diffraction slot 110, the mid-frequency asymmetric horn section 106 may have an outer horn wall length in the Y-direction of about 381 millimeters (mm) from an end of the throat section associated with the mid-frequency asymmetric horn section 106 to an outer end of the unified air pressure outlet associated with the mid-frequency asymmetric horn section 106. In contrast, in these examples, the high-frequency asymmetric horn section 102 has an outer horn wall length in the Y-direction of about 108 millimeters (mm) from an end of the throat section associated with the high-frequency asymmetric horn section 102 to an outer end of the unified air pressure outlet associated with the high-frequency asymmetric horn section 102.

[0039] In some examples, assuming a cross-section of the asymmetric dual entrant acoustic horn 100 along a plane intersecting both the mid-frequency diffraction slot 112 and the high-frequency diffraction slot 110, the mid-frequency asymmetric horn section 106 may have an inner horn wall length in the Y-direction of about 381 millimeters (mm) from an end of the throat section associated with the mid-frequency asymmetric horn section 106 to an inner end of the unified air pressure outlet associated with the mid-frequency asymmetric horn section 106. In contrast, in these examples, the high-frequency asymmetric horn section 102 has an inner horn wall length in the Y-direction of about 43 millimeters (mm) from an end of the throat section associated with the high-frequency asymmetric horn section 102 to an inner end of the unified air pressure outlet associated with the high-frequency asymmetric horn section 102.

[0040] As shown in FIGS. 1 and 2, the mid-frequency asymmetric horn section 106 and the high-frequency asymmetric horn section 102 are adjacent to one another because the inner horn wall of the mid-frequency asymmetric horn section 106 is physically joined to the inner horn wall of the high-frequency asymmetric horn section 102.

[0041] 1 and 2 depict an exemplary asymmetric acoustic horn 100 including only one high frequency transducer 104 and one mid frequency transducer 108, the disclosure is not so limited. In some examples of the disclosure, the acoustic horn 100 can include multiple high frequency transducers 104 and / or multiple mid frequency transducers 108.

[0042] 1 and 2 show an example of an asymmetric acoustic horn 100 having a continuous structure, the disclosure is not so limited. In some examples of the disclosure, the acoustic horn 100 can include several structural subcomponents of the same or similar material mechanically fastened together to form a single, integral structure of substantially the same or similar material. For example, the high frequency asymmetric horn section 102 and the mid frequency horn section 106 can be structural subcomponents mechanically fastened together to form an acoustically continuous, single, integral acoustic horn structure, although a single, integral acoustic horn structure is necessarily structurally continuous.

[0043] FIGURE 3 illustrates a front view of an example acoustic radiation pattern 300 output by the mid-frequency diffraction slot 112 of FIGURE 2, according to various embodiments of the present disclosure. FIGURE 4 illustrates a perspective view of the acoustic radiation pattern output by the mid-frequency diffraction slot 112 of FIGURE 2, according to various embodiments of the present disclosure. As shown in FIGURES 3 and 4, the asymmetric dual-entrant acoustic horn 100 outputs an acoustic radiation pattern 300 in the shape of a trapezoid from the mid-frequency diffraction slot 112 after receiving acoustic energy from one or more mid-frequency transducers 108.

[0044] A similar trapezoidal acoustic radiation pattern is output from high frequency diffraction slot 110. However, because high frequency diffraction slot 110 is smaller than mid frequency diffraction slot 112, the acoustic radiation pattern output from high frequency diffraction slot 110 is smaller than acoustic radiation pattern 300.

[0045] That is, the horizontal radiation pattern of the high frequency diffraction slots 110 and the mid frequency diffraction slots 112 results in a broader dispersion at the bottom of the horn exit and a narrower dispersion at the top of the horn exit. In this manner, the asymmetric dual entrant acoustic horn 100 can provide an improved listening experience for applications where audience members sitting closer to the asymmetric dual entrant acoustic horn 100 are positioned below the horn exit and audience members sitting further from the horn are positioned above the horn exit, such as in a movie theater seating environment as shown as stadium seating 502 in FIG. 5. Thus, the horizontal radiation pattern is asymmetric when measured from the bottom to the top of the horn exit. The vertical radiation pattern of the asymmetric dual entrant acoustic horn 100 is typically not asymmetric and is designed for a nominal fixed vertical coverage angle.

[0046] Figure 5 is a diagram illustrating an example of an acoustic radiation pattern 500 output by the asymmetric dual entrant acoustic horn 100 of Figures 1 and 2 for stadium seating 502, in accordance with various aspects of the present disclosure. A single acoustic radiation pattern 500 is shown in Figure 5, which includes the acoustic radiation pattern 300 shown in Figures 3 and 4 as a first radiation pattern that at least partially overlaps with the acoustic radiation pattern output by the high frequency diffraction slot 110 as a second radiation pattern.

[0047] Although these two radiation patterns may overlap, the single acoustic radiation pattern 500 substantially covers the entire stadium seating 502 (e.g., as evident from FIGS. 6 and 7). Furthermore, the interference from the overlap between the first and second radiation patterns can be mitigated by acoustic processing based on a fixed distance between the high frequency diffraction slots 110 and the mid frequency diffraction slots 112. Furthermore, the structural design of the high frequency asymmetric horn section 102 and the mid frequency asymmetric horn section 106 can also mitigate the interference from the overlap between the first and second radiation patterns.

[0048] 6 is a heat map illustrating an example of a 1 kHz acoustic energy distribution 600 output by the asymmetric dual entrant acoustic horn 100 of FIGS. 1 and 2 relative to an audience plane 602, according to various embodiments of the present disclosure. As shown in FIG. 6, the exemplary 1 kHz acoustic energy distribution 600 is evenly distributed on the audience plane 602 with an average direct sound pressure level (SPL) of 100.42 decibels (dB) between a maximum of 109.56 dB and a minimum of 91.31 dB. Furthermore, as shown in FIG. 6, the only portion of the exemplary 1 kHz acoustic energy distribution 600 that is below the average SPL is distributed directly to the left and right front of the asymmetric dual entrant acoustic horn 100.

[0049] 7 is a heat map illustrating an example of a 10 kHz acoustic energy distribution 700 output by the asymmetric dual entrant acoustic horn 100 of FIGS. 1 and 2 relative to an audience plane 702, according to various embodiments of the present disclosure. As shown in FIG. 7, the exemplary 10 kHz acoustic energy distribution 700 has an average direct SPL of 93.24 decibels (dB) between a maximum of 105.57 dB and a minimum of 80.91 dB, and is evenly distributed in a central portion 704 of the audience plane 702. Additionally, as shown in FIG. 7, the only portions of the exemplary 10 kHz acoustic energy distribution 700 that are below the average SPL are directly distributed to the left and right front of the asymmetric dual entrant acoustic horn 100.

[0050] Figure 8 illustrates a front view of an example comparative acoustic radiation pattern 800 output by an exemplary comparative symmetric acoustic horn 802. Figure 9 illustrates a perspective view of the acoustic radiation pattern 800 output by the comparative symmetric acoustic horn 802. As shown in Figures 8 and 9, the comparative dual entrant acoustic horn 802 outputs an acoustic radiation pattern 800 in the shape of a square after receiving energy from a single transducer.

[0051] Figure 10 is a diagram illustrating an example of an acoustic radiation pattern 1000 output by a comparative symmetric acoustic horn 802 relative to a stadium seat 1002. As shown in Figure 10, the acoustic radiation pattern 1000 does not substantially cover the entire stadium seat 1002 (as is evident, for example, from Figures 11 and 12).

[0052] FIG 11 is a heat map illustrating an example 1 kHz sound energy distribution 1100 output by the comparative symmetric acoustic horn 802 relative to an audience plane 1102. As shown in FIG 11, the exemplary 1 kHz sound energy distribution 1100 has an average direct SPL of 92.05 decibels (dB) between a maximum of 100.7 dB and a minimum of 83.4 dB, and is evenly distributed across a central portion 1104 of the audience plane 1102. Additionally, as shown in FIG 11, some portions of the exemplary 1 kHz sound energy distribution 1100 are below the average SPL. For example, a front portion 1106 and a rear portion 1108 are below the average SPL for the comparative symmetric acoustic horn 802.

[0053] Figure 12 is a heat map illustrating an example 10 kHz sound energy distribution 1200 output by a comparative symmetric acoustic horn 802 relative to an audience plane 1202. As shown in Figure 12, the exemplary 10 kHz sound energy distribution 1200 has an average direct SPL of 86.74 decibels (dB) between a maximum of 100.65 dB and a minimum of 72.83 dB, and is evenly distributed across a central portion 1204 of the audience plane 1202. Furthermore, as shown in Figure 12, only the central portion 1204 exceeds the average SPL of the exemplary 10 kHz sound energy distribution 700.

[0054] FIG. 13 is a table illustrating the differences between the asymmetric dual entrant acoustic horn of FIGS. 1 and 2 and a comparative acoustic horn, according to various embodiments of the present disclosure.

[0055] As shown in Figure 13, the asymmetric dual entrant acoustic horn 100 has a driver vertical spacing (i.e., in the Y direction in Figure 2) of approximately 10 inches, a width of approximately 29.875 inches, a height of approximately 29.875 inches, and an area of ​​approximately 6.1980 square feet. Additionally, the asymmetric dual entrant acoustic horn 100 has a rated SPL of 133 dB and an SPL per unit area of ​​approximately 21.46 dB / square foot.

[0056] As shown in Figure 13, the first comparative acoustic horn 1300 has a driver vertical spacing of about 18 inches, a width of about 29.875 inches, a height of about 40.75 inches, and an area of ​​about 8.4542 square feet. The first comparative acoustic horn 1300 also has a rated SPL of 139.16 dB and an SPL per unit area of ​​about 16.46 dB / square foot. The first comparative acoustic horn 1300 may be, for example, acoustic horn model number 3732-M / HF or acoustic horn model number 5732-M / HF manufactured by JBL, Inc., Los Angeles, California.

[0057] 13, the second comparative acoustic horn 1302 has a driver vertical spacing of approximately 20 inches, a width of approximately 29.875 inches, a height of approximately 38.375 inches, and an area of ​​approximately 7.9615 square feet. The second comparative acoustic horn 1302 also has a rated SPL of 131.4 dB and an SPL per unit area of ​​approximately 16.50 dB / square foot. The second comparative acoustic horn 1302 may be, for example, an acoustic horn model number MHV-1090 manufactured by QSC Corporation of Costa Mesa, California.

[0058] 13, the third comparative acoustic horn 1304 has a driver vertical spacing of about 18 inches, a width of about 39.5 inches, a height of about 35.375 inches, and an area of ​​about 9.7036 square feet. The third comparative acoustic horn 1304 also has a rated SPL of 132 dB and an SPL per unit area of ​​about 13.60 dB / square foot. The first comparative acoustic horn 1300 is, for example, an acoustic horn model number KPT-535 manufactured by Klipsch Corporation of Indianapolis, Indiana.

[0059] That is, the asymmetric dual entrant acoustic horn 100 is smaller than the first, second, and third comparative acoustic horns 1300-1304. Specifically, the asymmetric dual entrant acoustic horn 100 is 36.4%, 28.4%, and 56.56% smaller than the first, second, and third comparative acoustic horns 1300-1304, respectively. Furthermore, the asymmetric dual entrant acoustic horn 100 provides better acoustic energy distribution to stadium seating than the comparative acoustic horns, as shown in Figures 3-12, due to the asymmetric structure of the high frequency asymmetric horn section 102 and the mid frequency asymmetric horn section 106.

[0060] FIG 14 is a flow chart illustrating an exemplary method 1400. FIG 14 is described with respect to the asymmetric dual entrant acoustic horn 100 of FIGS. 1-4. The method 1400 includes outputting a first acoustic energy by one or more first acoustic transducers to a first asymmetric horn section of an asymmetric acoustic horn having a single acoustic waveguide. For example, a high frequency acoustic transducer 104 outputs the first acoustic energy to a throat section of the high frequency asymmetric horn section 102.

[0061] The method 1400 includes outputting, with one or more second acoustic transducers, a second acoustic energy to a second asymmetric horn section of the asymmetric acoustic horn in parallel with outputting the first acoustic energy to the first asymmetric horn section of the asymmetric acoustic horn (Block 1404). For example, the mid-frequency acoustic transducer 108 outputs the second acoustic energy to a throat section of the mid-frequency asymmetric horn section 106.

[0062] The method 1400 also includes outputting a first asymmetric radiation pattern from the first asymmetric horn section and a second asymmetric radiation pattern from the second asymmetric horn section with the asymmetric acoustic horn (Block 1406). For example, the asymmetric dual entrant acoustic horn 100 outputs a first trapezoidal acoustic radiation pattern 300 and a second trapezoidal acoustic radiation pattern.

[0063] As discussed above and as shown in Figures 1 and 2, the first asymmetric horn section and the second asymmetric horn section are contiguous with one another. Additionally, the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

[0064] Acoustic horns, speakers, and methods according to the present disclosure may incorporate one or more of the following features. (1) An asymmetric acoustic horn, a single acoustic waveguide; The single acoustic waveguide comprises: a first asymmetric horn section configured to support one or more first acoustic transducers; a second asymmetric horn section configured to support one or more second acoustic transducers, the one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers; Including, the first asymmetric horn section and the second asymmetric horn section are contiguous with one another; an asymmetric acoustic horn, wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (2) The asymmetric acoustic horn of (1), wherein the first asymmetric horn section includes one or more first diffraction slots and the second asymmetric horn section includes one or more second diffraction slots. (3) The asymmetric acoustic horn described in (2), wherein a first diffraction slot of the one or more first diffraction slots is configured to receive acoustic energy from a first acoustic transducer of the one or more first acoustic transducers. (4) The asymmetric acoustic horn of (2) or (3), wherein a second diffraction slot of the one or more second diffraction slots is configured to receive second acoustic energy from a second acoustic transducer of the one or more second acoustic transducers. (5) The asymmetric acoustic horn described in any one of (1) to (4), wherein the predetermined fixed distance between the first acoustic transducer and the second acoustic transducer is approximately 10 inches. (6) An asymmetric acoustic horn described in any of (1) to (5), wherein the single acoustic waveguide has a width of approximately 29.875 inches, a height of approximately 29.875 inches, and an area of ​​approximately 6.198 square feet. (7) An asymmetric acoustic horn described in any of (1) to (6), wherein the single acoustic waveguide has a rated sound pressure level (SPL) of approximately 133 decibels (dB) and an SPL per unit area of ​​approximately 21.46 dB / square foot. (8) The asymmetric acoustic horn described in any one of (1) to (7), wherein the first asymmetric horn section is further configured to receive acoustic energy from the one or more first acoustic transducers and output a trapezoidal acoustic radiation pattern. (9) The asymmetric acoustic horn described in any one of (1) to (8), wherein the second asymmetric horn section is further configured to receive acoustic energy from the one or more second acoustic transducers and output a trapezoidal acoustic radiation pattern. (10) A speaker, one or more first acoustic transducers; one or more second acoustic transducers; an asymmetric acoustic horn; the asymmetric acoustic horn includes a single acoustic waveguide; The single acoustic waveguide comprises: a first asymmetric horn section configured to support one or more first acoustic transducers; a second asymmetric horn section configured to support one or more second acoustic transducers, the one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers; Including, the first asymmetric horn section and the second asymmetric horn section are contiguous with one another; the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (11) The speaker according to (10), wherein the one or more second acoustic transducers have a higher frequency range than the one or more first acoustic transducers. (12) The speaker of any one of (10) to (11), wherein the predetermined fixed distance between the first acoustic transducer and the second acoustic transducer is about 10 inches. (13) A speaker described in any of (10) to (12), wherein the single acoustic waveguide has a width of approximately 29.875 inches, a height of approximately 29.875 inches, and an area of ​​approximately 6.198 square feet. (14) A speaker described in any of (10) to (13), wherein the single acoustic waveguide has a rated sound pressure level (SPL) of approximately 133 decibels (dB) and an SPL per unit area of ​​approximately 21.46 dB / square foot. (15) A speaker described in any one of (10) to (14), wherein the first asymmetric horn section is further configured to receive acoustic energy from the one or more first acoustic transducers and output a trapezoidal acoustic radiation pattern. (16) A speaker described in any of (1) to (15), wherein the second asymmetric horn section is further configured to receive second acoustic energy from the one or more second acoustic transducers and output a second trapezoidal acoustic radiation pattern. (17) The speaker of (16), wherein a first perimeter of the first trapezoidal acoustic radiation pattern is wider at a bottom of the first perimeter along the Y direction than at a top of the first perimeter along the Y direction, and a second perimeter of the second trapezoidal acoustic radiation pattern is wider at a bottom of the second perimeter along the Y direction than at a top of the second perimeter along the Y direction. (18) A method comprising the steps of: outputting a first acoustic energy by one or more first acoustic transducers into a first asymmetric horn section of an asymmetric acoustic horn having a single acoustic waveguide; outputting, with one or more second acoustic transducers, a second acoustic energy to a second asymmetric horn section of the asymmetric acoustic horn in parallel with outputting the first acoustic energy to the first asymmetric horn section of the asymmetric acoustic horn; outputting a first asymmetric radiation pattern from the first asymmetric horn section and a second asymmetric radiation pattern from the second asymmetric horn section with the asymmetric acoustic horn; Including, the first asymmetric horn section and the second asymmetric horn section are adjacent to each other; wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (19) The method of (18), wherein the first asymmetric radiation pattern is a first trapezoidal radiation pattern and the second asymmetric radiation pattern is a second trapezoidal radiation pattern. (20) A non-transitory computer-readable medium storing instructions that, when executed by an electronic processor, cause the electronic processor to perform operations including the method described in (18).

[0065] Although described herein with respect to devices, systems, methods, heuristics, and the like, it should be understood that although steps of such processes, etc. have been described as occurring according to a particular ordered sequence, such processes may be practiced with the described steps being performed in an order different from that described herein. It should be further understood that certain steps may be performed simultaneously, other steps may be added, or certain steps described herein may be omitted. In other words, the description of processes herein is provided for the purpose of illustrating particular embodiments and should not be considered as limiting the claims.

[0066] Therefore, it should be understood that the above description is intended to be illustrative and not restrictive. Many embodiments and applications other than the examples provided will become apparent upon reading the above description. The scope should be determined without reference to the above description, but instead with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. It is anticipated and intended that future developments will occur in the technology discussed herein, and that the disclosed systems and methods will be incorporated into such future embodiments. In summary, it should be understood that this application is capable of modification and alteration.

[0067] All terms used in the claims are intended to be given their broadest reasonable construction and ordinary meaning as understood by those skilled in the art to which they pertain. In particular, the use of singular articles such as "a," "the," "said," etc. shall be read to describe one or more of the indicated elements, unless the claim expressly states a limitation to the contrary.

[0068] The Summary of the Disclosure is provided to enable the reader to quickly assess the nature of the technical disclosure. It is understood that it is not used to interpret or limit the scope or meaning of the claims. Moreover, in the foregoing Detailed Description, it will be seen that various features are grouped together in various embodiments for the purpose of streamlining the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the claimed embodiments incorporate more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as separately claimed subject matter.

[0069] Various aspects of the invention may be apparent from the enumerated example embodiments (EEE) described below. (EEE1) An asymmetric acoustic horn, a single acoustic waveguide; The single acoustic waveguide comprises: a first asymmetric horn section configured to support one or more first acoustic transducers; a second asymmetric horn section configured to support one or more second acoustic transducers, the one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers; Including, the first asymmetric horn section and the second asymmetric horn section are contiguous with one another; an asymmetric acoustic horn, wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (EEE2) The asymmetric acoustic horn described in EEE1, wherein the first asymmetric horn section includes one or more first diffractive slots and the second asymmetric horn section includes one or more second diffractive slots. (EEE3) The asymmetric acoustic horn described in EEE2, wherein a first diffraction slot of the one or more first diffraction slots is configured to receive acoustic energy from a first acoustic transducer of the one or more first acoustic transducers. (EEE4) The asymmetric acoustic horn described in EEE2 or EEE3, wherein a second diffraction slot of the one or more second diffraction slots is configured to receive second acoustic energy from a second acoustic transducer of the one or more second acoustic transducers. (EEE5) The asymmetric acoustic horn described in any one of EEE1 to 4, wherein the predetermined fixed distance between the first acoustic transducer and the second acoustic transducer is approximately 10 inches. (EEE6) An asymmetric acoustic horn described in any of EEE1-5, wherein the single acoustic waveguide has a width of approximately 29.875 inches, a height of approximately 29.875 inches, and an area of ​​approximately 6.198 square feet. (EEE7) An asymmetric acoustic horn described in any of EEE1 to 6, wherein the single acoustic waveguide has a rated sound pressure level (SPL) of approximately 133 decibels (dB) and an SPL per unit area of ​​approximately 21.46 dB / square foot. (EEE8) The asymmetric acoustic horn described in any of EEE1-7, wherein the first asymmetric horn section is further configured to receive acoustic energy from the one or more first acoustic transducers and output a first trapezoidal acoustic radiation pattern. (EEE9) The asymmetric acoustic horn described in any of EEE1-8, wherein the second asymmetric horn section is further configured to receive acoustic energy from the one or more second acoustic transducers and output a second trapezoidal acoustic radiation pattern. (EEE10) a first perimeter of the first trapezoidal acoustic radiation pattern is wider at a bottom of the first perimeter than at a top of the first perimeter along a Y direction (such that the first trapezoidal acoustic radiation pattern is asymmetric when measured along a direction from bottom to top of the outlet of the asymmetric acoustic horn); 10. The asymmetric acoustic horn of EEE8 and 9, wherein a second perimeter of the second trapezoidal acoustic radiation pattern is wider at a bottom of the second perimeter than at a top of the second perimeter along a Y direction (such that the second trapezoidal radiation pattern is asymmetric when measured along a direction from bottom to top of the exit of the asymmetric acoustic horn). (EEE11) An asymmetric acoustic horn described in any of EEE1 to 10, wherein the first asymmetric horn section is configured to output a first asymmetric radiation pattern and the second asymmetric horn section is configured to output a second asymmetric radiation pattern, and the first and second asymmetric radiation patterns have shapes that are not symmetric with respect to a plane extending in the horizontal direction. (EEE12) The asymmetric acoustic horn of EEE11, wherein the first asymmetric radiation pattern is a first trapezoidal radiation pattern and the second asymmetric radiation pattern is a second trapezoidal radiation pattern. (EEE13) A speaker, one or more first acoustic transducers; one or more second acoustic transducers; an asymmetric acoustic horn; the asymmetric acoustic horn includes a single acoustic waveguide; The single acoustic waveguide comprises: a first asymmetric horn section configured to support one or more first acoustic transducers; a second asymmetric horn section configured to support one or more second acoustic transducers, the one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers; Including, the first asymmetric horn section and the second asymmetric horn section are contiguous with one another; the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (EEE14) A speaker described in EEE13, wherein the first asymmetric horn section is configured to output a first asymmetric radiation pattern and the second asymmetric horn section is configured to output a second asymmetric radiation pattern, the first and second asymmetric radiation patterns having shapes that are not symmetric with respect to a plane extending in the horizontal direction. (EEE15) The first asymmetric horn section includes a first diffraction slot configured to output the first asymmetric radiation pattern as a first trapezoidal radiation pattern; The loudspeaker as described in EEE14, wherein the second asymmetric horn section includes a second diffraction slot configured to output the second asymmetric radiation pattern as a second trapezoidal radiation pattern. (EEE16) A speaker as described in EEE15, wherein the first and second asymmetric radiation patterns output by the first and second diffraction slots provide a wider dispersion at a bottom of the acoustic horn outlet and a narrower dispersion at a top of the horn outlet. (EEE17) The speaker according to any one of EEE13 to 16, wherein the one or more second acoustic transducers have a higher frequency range than the one or more first acoustic transducers. (EEE18) The first asymmetric horn section is a mid-frequency asymmetric horn section configured to support one or more first acoustic transducers, the one or more first acoustic transducers being one or more mid-frequency transducers; The loudspeaker as described in EEE17, wherein the second asymmetric horn section is a high frequency asymmetric horn section configured to support one or more second acoustic transducers, the one or more high frequency transducers. (EEE19) A speaker according to EEE18 dependent on EEE15 or 16, wherein the first diffraction slot is a mid-frequency diffraction slot and the second diffraction slot is a high-frequency diffraction slot located above the mid-frequency diffraction slot. (EEE20) The speaker according to any one of EEE13 to 19, wherein the predetermined fixed distance between the first acoustic transducer and the second acoustic transducer is approximately 10 inches. (EEE21) A speaker as described in any of EEE13 to 20, wherein the single acoustic waveguide has a width of approximately 29.875 inches, a height of approximately 29.875 inches, and an area of ​​approximately 6.198 square feet. (EEE22) A speaker described in any of EEE13 to 21, wherein the single acoustic waveguide has a rated sound pressure level (SPL) of approximately 133 decibels (dB) and an SPL per unit area of ​​approximately 21.46 dB / square foot. (EEE23) A speaker according to any of EEE13 to 22, wherein the first asymmetric horn section is further configured to receive acoustic energy from the one or more first acoustic transducers and to output a first trapezoidal acoustic radiation pattern. (EEE24) A speaker according to any of EEE13 to 23, wherein the second asymmetric horn section is further configured to receive acoustic energy from the one or more second acoustic transducers and to output a second trapezoidal acoustic radiation pattern. (EEE25) a first perimeter of the first trapezoidal acoustic radiation pattern is wider at a bottom of the first perimeter than at a top of the first perimeter along a Y direction (such that the first trapezoidal acoustic radiation pattern is asymmetric when measured along a direction from bottom to top of the outlet of the asymmetric acoustic horn); A loudspeaker as described in EEE23 and 24, wherein a second perimeter of the second trapezoidal acoustic radiation pattern is wider at a bottom of the second perimeter than at a top of the second perimeter along a Y direction (such that the second trapezoidal radiation pattern is asymmetric when measured along a direction from bottom to top of the outlet of the asymmetric acoustic horn). (EEE26) A method comprising the steps of: outputting a first acoustic energy by one or more first acoustic transducers into a first asymmetric horn section of an asymmetric acoustic horn having a single acoustic waveguide; outputting, with one or more second acoustic transducers, a second acoustic energy to a second asymmetric horn section of the asymmetric acoustic horn in parallel with outputting the first acoustic energy to the first asymmetric horn section of the asymmetric acoustic horn; outputting a first asymmetric radiation pattern from the first asymmetric horn section and a second asymmetric radiation pattern from the second asymmetric horn section with the asymmetric acoustic horn; Including, the first asymmetric horn section and the second asymmetric horn section are adjacent to each other; wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances. (EEE27) The method of EEE26, wherein the first and second asymmetric radiation patterns have a shape that is not symmetric with respect to a horizontally extending plane. (EEE28) The method of any one of EEE26 to 27, wherein the first asymmetric radiation pattern is a first trapezoidal radiation pattern and the second asymmetric radiation pattern is a second trapezoidal radiation pattern. (EEE29) The method of EEE28, wherein the first trapezoidal radiation pattern is output by a first diffraction slot of the first asymmetric horn section and the second trapezoidal radiation pattern is output by a second diffraction slot of the second asymmetric horn section. (EEE30) A speaker as described in EEE29, wherein the first and second asymmetric radiation patterns output by the first and second diffraction slots provide a wider dispersion at a bottom of the acoustic horn outlet and a narrower dispersion at a top of the horn outlet. (EEE31) A method according to any of EEE26 to 30, wherein one or more of the first acoustic transducers are mid-frequency transducers and the first asymmetric horn section is a mid-frequency asymmetric horn section, and one or more of the second acoustic transducers are high-frequency transducers and the second asymmetric horn section is a high-frequency asymmetric horn section. (EEE32) The method of EEE31 dependent on EEE29 or 30, wherein the first diffraction slot is a mid-frequency diffraction slot and the second diffraction slot is a high-frequency diffraction slot located above the mid-frequency diffraction slot. (EEE33) A non-transitory computer-readable medium storing instructions which, when executed by an electronic processor, cause the electronic processor to perform operations including a method described in any of EEE26-32.

Claims

1. 1. An asymmetric acoustic horn, comprising: a single acoustic waveguide; The single acoustic waveguide comprises: a first asymmetric horn section configured to support one or more first acoustic transducers; a second asymmetric horn section configured to support one or more second acoustic transducers, the one or more second acoustic transducers having a different frequency range than the one or more first acoustic transducers; Including, the first asymmetric horn section and the second asymmetric horn section are continuous with each other, and the second asymmetric horn section is integrated with the first asymmetric horn section at a top wall of the asymmetric acoustic horn corresponding to a top of an outlet of the asymmetric acoustic horn, the top wall being narrower than the top wall; an asymmetric acoustic horn, wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

2. 2. The asymmetric acoustic horn of claim 1, wherein the first asymmetric horn section is configured to output a first asymmetric radiation pattern and the second asymmetric horn section is configured to output a second asymmetric radiation pattern, the first and second asymmetric radiation patterns having shapes that are not symmetric with respect to a horizontally extending plane.

3. The asymmetric acoustic horn of claim 2 , wherein the first asymmetric radiation pattern is a first trapezoidal acoustic radiation pattern and the second asymmetric radiation pattern is a second trapezoidal acoustic radiation pattern.

4. The asymmetric acoustic horn of any one of claims 1 to 3, wherein the first asymmetric horn section includes one or more first diffraction slots and the second asymmetric horn section includes one or more second diffraction slots.

5. 5. The asymmetric acoustic horn of claim 4, wherein a first diffraction slot of the one or more first diffraction slots is configured to receive acoustic energy from a first acoustic transducer of the one or more first acoustic transducers.

6. 6. The asymmetric acoustic horn of claim 4 or 5, wherein a second diffraction slot of the one or more second diffraction slots is configured to receive second acoustic energy from a second acoustic transducer of the one or more second acoustic transducers.

7. The asymmetric acoustic horn of any one of claims 1 to 6, wherein the predetermined fixed distance between the first acoustic transducer and the second acoustic transducer is approximately 10 inches.

8. 8. The asymmetric acoustic horn of claim 1, wherein the single acoustic waveguide has a width of about 29.875 inches, a height of about 29.875 inches, and an area of ​​about 6.198 square feet.

9. 9. The asymmetric acoustic horn of claim 1, wherein the single acoustic waveguide has a rated sound pressure level (SPL) of about 133 decibels (dB) and an SPL per unit area of ​​about 21.46 dB / ft2.

10. 10. The asymmetric acoustic horn of claim 1, wherein the first asymmetric horn section is further configured to receive acoustic energy from the one or more first acoustic transducers and output a first trapezoidal acoustic radiation pattern.

11. 11. The asymmetric acoustic horn of claim 10, wherein the second asymmetric horn section is further configured to receive acoustic energy from the one or more second acoustic transducers and output a second trapezoidal acoustic radiation pattern.

12. a first perimeter of the first trapezoidal acoustic radiation pattern is wider at a bottom of the first perimeter than at a top of the first perimeter such that the first trapezoidal acoustic radiation pattern is asymmetric when measured along a direction from bottom to top of the asymmetric acoustic horn exit; 12. The asymmetric acoustic horn of claim 11, wherein a second perimeter of the second trapezoidal acoustic radiation pattern is wider at a bottom of the second perimeter than at a top of the second perimeter such that the second trapezoidal acoustic radiation pattern is asymmetric when measured along a direction from bottom to top of an exit of the asymmetric acoustic horn.

13. A speaker, one or more first acoustic transducers; one or more second acoustic transducers; An asymmetric acoustic horn according to any one of claims 1 to 12, A speaker including:

14. 14. The loudspeaker of claim 13, wherein the first asymmetric horn section is configured to output a first asymmetric radiation pattern and the second asymmetric horn section is configured to output a second asymmetric radiation pattern, the first and second asymmetric radiation patterns having shapes that are not symmetric with respect to a horizontally extending plane.

15. the first asymmetric horn section includes a first diffraction slot configured to output the first asymmetric radiation pattern as a first trapezoidal acoustic radiation pattern; 15. The loudspeaker of claim 14, wherein the second asymmetric horn section includes a second diffraction slot configured to output the second asymmetric radiation pattern as a second trapezoidal acoustic radiation pattern.

16. 16. The loudspeaker of claim 15, wherein the first and second asymmetric radiation patterns output by the first and second diffraction slots provide a wider dispersion at a bottom of the outlet of the asymmetric acoustic horn and a narrower dispersion at a top of the outlet of the asymmetric acoustic horn.

17. A loudspeaker according to any one of claims 13 to 16, wherein the one or more second acoustic transducers have a higher frequency range than the one or more first acoustic transducers.

18. the first asymmetric horn section is a mid-frequency asymmetric horn section configured to support one or more first acoustic transducers, the one or more first acoustic transducers being mid-frequency transducers; 20. The loudspeaker of claim 17, wherein the second asymmetric horn section is a high frequency asymmetric horn section configured to support one or more second acoustic transducers, the one or more being high frequency transducers.

19. 19. A loudspeaker according to claim 18 when dependent on claim 15 or 16, wherein the first diffraction slot is a mid-frequency diffraction slot and the second diffraction slot is a high-frequency diffraction slot located above the mid-frequency diffraction slot.

20. 1. A method comprising: outputting a first acoustic energy with one or more first acoustic transducers into a first asymmetric horn section of an asymmetric acoustic horn having a single acoustic waveguide; outputting, with one or more second acoustic transducers, a second acoustic energy to a second asymmetric horn section of the asymmetric acoustic horn in parallel with outputting the first acoustic energy to the first asymmetric horn section of the asymmetric acoustic horn; outputting a first asymmetric radiation pattern from the first asymmetric horn section and a second asymmetric radiation pattern from the second asymmetric horn section with the asymmetric acoustic horn; Including, the first asymmetric horn section and the second asymmetric horn section are adjacent to each other, and the second asymmetric horn section is integrated with the first asymmetric horn section at a top wall of the asymmetric acoustic horn corresponding to a top of an outlet of the asymmetric acoustic horn, the top wall being narrower than the top wall; wherein the first asymmetric horn section and the second asymmetric horn section are configured to separate each of the one or more first acoustic transducers from a corresponding one of the one or more second acoustic transducers by a corresponding one or more predetermined fixed distances.

21. The method of claim 20 , wherein the first and second asymmetric radiation patterns have a shape that is not symmetric about a horizontally extending plane.

22. 22. The method of claim 20 or 21, wherein the first asymmetric radiation pattern is a first trapezoidal acoustic radiation pattern and the second asymmetric radiation pattern is a second trapezoidal acoustic radiation pattern.

23. 23. The method of claim 22, wherein the first trapezoidal acoustic radiation pattern is output by a first diffraction slot of the first asymmetric horn section and the second trapezoidal acoustic radiation pattern is output by a second diffraction slot of the second asymmetric horn section.

24. 24. The method of claim 23, wherein the first and second asymmetric radiation patterns output by the first and second diffraction slots provide a wider dispersion at a bottom of an exit of the asymmetric acoustic horn and a narrower dispersion at a top of an exit of the asymmetric acoustic horn.

25. 25. The method of any of claims 20-24, wherein the one or more first acoustic transducers are mid-frequency transducers, the first asymmetric horn section is a mid-frequency asymmetric horn section, and the one or more second acoustic transducers are high-frequency transducers, and the second asymmetric horn section is a high-frequency asymmetric horn section.

26. 26. The method of claim 25 when dependent on claim 23 or 24, wherein the first diffraction slot is a mid-frequency diffraction slot and the second diffraction slot is a high-frequency diffraction slot located above the mid-frequency diffraction slot.

Images